Process tube for manufacturing semiconductor wafers



FIG. 1 is a front view of the design for a process tube for manufacturing semiconductor wafers in accordance with the invention;

FIG. 2 is a rear view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a front perspective view thereof.

The broken line showings are for the purpose of illustrating environmental structure and forms no part of the claimed design. 

The ornamental design for a process tube for manufacturing semiconductor wafers, as shown and described. 